Permanent Molars Flashcards
What is the geometry of the permanent molars from the buccal surface ?
Trapezoidal shape
What is the molar geometry for the interstitial surface ?
Upper - trapezoidal
Lower - rhomboidal
What are the characteristics of the permanent maxillary first molar ?
- 3 roots
- carabelli trait found on the mesiopalatal side
- 4 cusps
- H shaped fissure
What are the characteristics of the permanent maxillary second molar ?
- 3 roots
- lack of carabelli trait
- roots are less divergent than first molar
What are the characteristics of the permanent mandibular first molar ?
- 2 roots
- 5 cusps
- transverse fissure with extensions
- mesial root may have 2 root canals so 3 root canals altogether
What are the characteristics of the permanent mandibular second molar ?
- 2 roots
- 4 cusps
- cross shaped occlusal fissure
How is the permanent mandibular second molar sided ?
The mesiobuccal and mesiolingual cusps are bigger than the distobuccal and distolingual cusps
What is microdontia ?
Excessively small teeth
What is macrodontia ?
Excessively big teeth
What are dilacerated roots ?
When the roots bend excessively
What are enamel pearIs ?
When balls of ectopic enamel are found on the roots
What are mulberry molars ?
Lots of little cusplets on the molars
What is a fused tooth ?
When 2 tooth gems fuse
What are geminated teeth ?
When 1 tooth gem splits into 2
What is concrescence ?
With age, dental cementum continues to form on the root and in some cases the roots can fuse because the cementum joins
